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inquiryDayangchem’s R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. Near 20 years DayangChem has provided dif
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inquiryWith our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements. Consistent Quality Our plant has strict quality control in each manufacturin
Henan Tianfu Chemical Co., Ltd. is located in Zhengzhou High-tech Development Zone with import and export license. We passed ISO 9001:2008 in 2009, and won "High-tech Enterprise" by provincial government in 2013.The objective of the com
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inquiryWITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et
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inquiryProduct Name Wedelolactone Molecular formula C16H10O7 CAS 524-12-9 Molecular Weight 314.249 HPLC 98% Grade
1.No Less 8 years exporting experience. Clients can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specialized
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inquiryOur company has been in existence for 10 years since its establishment. We have our own unique team. The company integrates independent research and development, production and sales. We have established famous brands at home and abroad. At prese
Cas:524-12-9
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inquiryWEDELOLACTONE CAS:524-12-9 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high quality organic intermediates
Cas:524-12-9
Min.Order:1 Gram
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inquiryHello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai
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inquiry1. Timely and efficient service to ensure communication with customers 2. Produce products of different specifications and sizes according to your requirements. 3. Quality procedures and standards recognized by SGS. Advanced plant equipment ensures s
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inquiryHenan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod
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inquiryChengdu Biopurify Phytochemicals Ltd. is a leading company in the research, development, manufacture and marketing of High Quality Phytochemicals and Extracts(especially Active Ingredients from Traditional Chinese Medicine,Traditional Chinese Medic
Triumph has the complete production of G- KG - MT service chain,we can make the new technology into productivity quickly in the research and development of new products. Main Business Custom Synthesis: Trading(Raw Mater
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inquiryHangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det
The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi
J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia
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inquiryWhy Choose Us: 1. Factory direct sales, so we can provide the competitive price and high quality product base on 8 years of production and R&D experience. 2. It is available in stock for quick shipment.Products could be packaged according to cu
Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi
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inquiryWedelolactoneAppearance:Yellow powder Package:according to customers' requirements Application:research use Transportation:By air(EMS or EUB or FedEx or TNT ect...) or by sea(FOB or CIF or CNF ect...)or according to your demand. Port:Any port
Our Advantages A. International Top level TechnologyOur company owned biomedicine experts are famous at home and abroad with rich experience in research and development in the field of efficient chiral functional molecules research and development an
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Type:Trading Company
inquiryShandong Mopai Biotechnology Co., LTD is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemicals. W
1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer
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inquiryThe quality is guaranteed. If you find the product is wrong compared with COA, we promise 100% refund or change product. COA and HPLC will be shipped out with goods. You can also inform your analysis method and we will follow your analysis me
GOLDEN PHARMA CO.,LIMITED.is a professional pharmaceutical company,our team have more than 20years expereince in pharmaceutical production and sales. we are a professional technical enterprise specializing in the R & D, production,QA regulation
We are a Union of chemistry in China, consists of chemists,engineers, laboratories,factories in China. We organize surplus capacity of R&D and production as well as custom synthesis for chemical products and chemical business project. We are supp
We produce carbomer by our own factory,carbomer 940 is our best seller.It is used for cosmetic and medical.And we also become agent for lubrizol.Our carbomer 940 get high viscosity and good transparency.The price will depond on the market,surely supp
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inquiry2-(2,6-dihydroxy-4-methoxy-phenyl)-5,6-dihydroxy-benzofuran-3-carboxylic acid methyl ester
wedelolactone
Conditions | Yield |
---|---|
With sulfuric acid; acetic acid In water at 50℃; for 1h; | 93% |
1-hydroxy-3-methoxy-8,9-diisopropyloxy-benzo[4,5]furo[3,2-c]chromen-6-one
wedelolactone
Conditions | Yield |
---|---|
With boron trichloride In dichloromethane at 0℃; | 87% |
1,8,9-tris(benzyloxy)-3-methoxy-6H-benzofuro[3,2-c]chromen-6-one
wedelolactone
Conditions | Yield |
---|---|
With hydrogen; palladium on activated charcoal In 1,4-dioxane Product distribution; 2nd step of purification of 9 (wedelolactone); | 82% |
With boron trichloride In dichloromethane at 0℃; Inert atmosphere; | 81% |
Conditions | Yield |
---|---|
With sodium acetate; potassium hexacyanoferrate(III) In water; acetone for 2h; Ambient temperature; | 25% |
With ascorbic acid 1.) tyrosinase, pH=6.8, r.t., 1 h; Yield given. Multistep reaction; |
wedelolactone
Conditions | Yield |
---|---|
With hydrogen iodide |
Conditions | Yield |
---|---|
Multi-step reaction with 8 steps 1.1: m-chloroperbenzoic acid / CH2Cl2; H2O / 15 h / 20 °C 1.2: 90 percent / K2CO3 / methanol / 0.5 h / 25 °C 2.1: 99 percent / Et3N / tetrahydrofuran / 2 h / 25 °C 3.1: 94 percent / N-iodosuccinimide; trifluoroacetic acid / acetonitrile / 12 h / 40 °C 4.1: 90 percent / CuI; Et3N / PdCl2(PPh3)2 / acetonitrile / 12 h / 25 °C 5.1: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 6.1: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 7.1: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 8.1: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme | |
Multi-step reaction with 8 steps 1.1: 3-chloro-benzenecarboperoxoic acid / water; dichloromethane / 15 h / 20 °C 1.2: 0.5 h / 20 °C 2.1: sodium hydride / N,N-dimethyl-formamide / 0.5 h / 0 °C 2.2: 20 °C 3.1: N-Bromosuccinimide / N,N-dimethyl-formamide / 4.5 h / 0 - 20 °C 4.1: triethylamine; bis-triphenylphosphine-palladium(II) chloride / tetrahydrofuran / 80 °C / Inert atmosphere 5.1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 6.1: potassium carbonate / N,N-dimethyl-formamide 7.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 8.1: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
3,4-dibenzyloxyphenol
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 7 steps 1: 99 percent / Et3N / tetrahydrofuran / 2 h / 25 °C 2: 94 percent / N-iodosuccinimide; trifluoroacetic acid / acetonitrile / 12 h / 40 °C 3: 90 percent / CuI; Et3N / PdCl2(PPh3)2 / acetonitrile / 12 h / 25 °C 4: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 5: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 6: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 7: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme | |
Multi-step reaction with 7 steps 1.1: sodium hydride / N,N-dimethyl-formamide / 0.5 h / 0 °C 1.2: 20 °C 2.1: N-Bromosuccinimide / N,N-dimethyl-formamide / 4.5 h / 0 - 20 °C 3.1: triethylamine; bis-triphenylphosphine-palladium(II) chloride / tetrahydrofuran / 80 °C / Inert atmosphere 4.1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 5.1: potassium carbonate / N,N-dimethyl-formamide 6.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 7.1: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
3,4-Dibenzyloxyphenyl-acetat
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1: 94 percent / N-iodosuccinimide; trifluoroacetic acid / acetonitrile / 12 h / 40 °C 2: 90 percent / CuI; Et3N / PdCl2(PPh3)2 / acetonitrile / 12 h / 25 °C 3: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 4: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 5: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 6: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme |
2,6-bis(benzyloxy)-4-methoxybenzaldehyde
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1.1: t-BuOK / tetrahydrofuran / 0.5 h / 0 °C 1.2: 75 percent / t-BuOK / tetrahydrofuran / 0 - 25 °C 2.1: 90 percent / CuI; Et3N / PdCl2(PPh3)2 / acetonitrile / 12 h / 25 °C 3.1: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 4.1: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 5.1: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 6.1: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 9 steps 1.1: 94 percent / K2CO3; n-Bu4NI / acetone / 24 h / Heating 2.1: m-chloroperbenzoic acid / CH2Cl2; H2O / 15 h / 20 °C 2.2: 90 percent / K2CO3 / methanol / 0.5 h / 25 °C 3.1: 99 percent / Et3N / tetrahydrofuran / 2 h / 25 °C 4.1: 94 percent / N-iodosuccinimide; trifluoroacetic acid / acetonitrile / 12 h / 40 °C 5.1: 90 percent / CuI; Et3N / PdCl2(PPh3)2 / acetonitrile / 12 h / 25 °C 6.1: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 7.1: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 8.1: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 9.1: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme | |
Multi-step reaction with 9 steps 1.1: potassium carbonate / N,N-dimethyl-formamide / 4 h / 20 °C 2.1: 3-chloro-benzenecarboperoxoic acid / water; dichloromethane / 15 h / 20 °C 2.2: 0.5 h / 20 °C 3.1: sodium hydride / N,N-dimethyl-formamide / 0.5 h / 0 °C 3.2: 20 °C 4.1: N-Bromosuccinimide / N,N-dimethyl-formamide / 4.5 h / 0 - 20 °C 5.1: triethylamine; bis-triphenylphosphine-palladium(II) chloride / tetrahydrofuran / 80 °C / Inert atmosphere 6.1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 7.1: potassium carbonate / N,N-dimethyl-formamide 8.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 9.1: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
1,3-Bis-benzyloxy-2-ethynyl-5-methoxy-benzene
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 90 percent / CuI; Et3N / PdCl2(PPh3)2 / acetonitrile / 12 h / 25 °C 2: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 3: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 4: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 5: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme |
acetic acid 4,5-bis-benzyloxy-2-iodo-phenyl ester
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 90 percent / CuI; Et3N / PdCl2(PPh3)2 / acetonitrile / 12 h / 25 °C 2: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 3: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 4: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 5: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme |
4,5-bis-benzyloxy-2-(2,6-bis-benzyloxy-4-methoxy-phenylethynyl)-phenol
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 2: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 3: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme |
acetic acid 4,5-bis-benzyloxy-2-(2,6-bis-benzyloxy-4-methoxy-phenylethynyl)-phenyl ester
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: 98 percent / hydrazine monohydrate / tetrahydrofuran / 2 h / 25 °C 2: 87 percent / thiourea; Cs2CO3; CBr4 / PdI2 / tetrahydrofuran / 2 h / 50 °C 3: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 4: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme |
5,6-bis-benzyloxy-2-(2,6-bis-benzyloxy-4-methoxy-phenyl)-benzofuran-3-carboxylic acid methyl ester
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 93 percent / H2 / Pd/C / ethyl acetate / 24 h / 25 °C 2: 93 percent / AcOH; H2SO4 / H2O / 1 h / 50 °C View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: hydrogenchloride / diethyl ether / 2 h 2: hydrogenchloride / 1 h / Heating 3: sodium carbonate / water / 1 h / 80 °C 4: ascorbic acid / 1.) tyrosinase, pH=6.8, r.t., 1 h View Scheme | |
Multi-step reaction with 8 steps 1.1: zinc(II) chloride / 2 h / 100 °C 2.1: potassium carbonate / acetone / 1 h / 90 °C 2.2: 1.5 h / 90 °C 3.1: bromine / dichloromethane / 8 h / 0 - 10 °C 3.2: 1 h / 20 °C 4.1: potassium carbonate / acetone / 56 °C 5.1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 6.1: potassium carbonate / N,N-dimethyl-formamide 7.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 8.1: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
4-amino-5,7-dihydroxycoumarin
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: hydrogenchloride / 1 h / Heating 2: sodium carbonate / water / 1 h / 80 °C 3: ascorbic acid / 1.) tyrosinase, pH=6.8, r.t., 1 h View Scheme |
4,5,7-trihydroxycoumarin
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: sodium carbonate / water / 1 h / 80 °C 2: ascorbic acid / 1.) tyrosinase, pH=6.8, r.t., 1 h View Scheme |
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 2: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 2: potassium carbonate / N,N-dimethyl-formamide 3: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 4: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1: N-Bromosuccinimide / N,N-dimethyl-formamide / 4.5 h / 0 - 20 °C 2: triethylamine; bis-triphenylphosphine-palladium(II) chloride / tetrahydrofuran / 80 °C / Inert atmosphere 3: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 4: potassium carbonate / N,N-dimethyl-formamide 5: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 6: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: triethylamine; bis-triphenylphosphine-palladium(II) chloride / tetrahydrofuran / 80 °C / Inert atmosphere 2: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 3: potassium carbonate / N,N-dimethyl-formamide 4: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 5: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 7 steps 1.1: potassium carbonate / acetone / 1 h / 90 °C 1.2: 1.5 h / 90 °C 2.1: bromine / dichloromethane / 8 h / 0 - 10 °C 2.2: 1 h / 20 °C 3.1: potassium carbonate / acetone / 56 °C 4.1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 5.1: potassium carbonate / N,N-dimethyl-formamide 6.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 7.1: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
5,7-diacetoxyl-2-chromenone
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1.1: bromine / dichloromethane / 8 h / 0 - 10 °C 1.2: 1 h / 20 °C 2.1: potassium carbonate / acetone / 56 °C 3.1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 4.1: potassium carbonate / N,N-dimethyl-formamide 5.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 6.1: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
3-bromo-5,7-diacetoxyl-2-chromenone
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: potassium carbonate / acetone / 56 °C 2: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 3: potassium carbonate / N,N-dimethyl-formamide 4: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 5: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate / water; tetrahydrofuran / 12 h / 90 °C / Inert atmosphere 2: potassium carbonate / N,N-dimethyl-formamide 3: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 4: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
wedelolactone
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: potassium carbonate / N,N-dimethyl-formamide 2: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 24 h / Reflux 3: boron trichloride / dichloromethane / 0 °C / Inert atmosphere View Scheme |
wedelolactone
benzyl chloride
1,8,9-tris(benzyloxy)-3-methoxy-6H-benzofuro[3,2-c]chromen-6-one
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide for 0.833333h; Heating; | 29% |
Conditions | Yield |
---|---|
With triethylamine In tetrahydrofuran at 25℃; for 2h; |
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